TITLE: Fractals reference
QUESTION [27 upvotes]: I want to present an elementary lecture about Fractals in the Nature. So, I am searching open or online references with good pictures like the following one:
 
I prepared a good program that makes the fractals and the participants don't  know much the analysis patterns behind this concept, so I am going to introduce Fractals in the Nature just by doing some graphical figures or setting formulas and etc. I will be so pleased if I know your suggestions.Thanks for the time  you will give me.

REPLY [2 votes]: Maybe photos here be useful. There are 18 photos there.